Reincarnation; a Severus Snape fanfic

Lily Collins never really knew who she was as a person. For 13 years, she'd have dreams about events that seemed to have happened long ago. These dreams made her feel different from others. Not to mention the fact that she can use magic.

Lily starts her first year of Hogwarts at age 13. During her stay, she learns more about herself. Or well more about her past life. What happens when these so called dreams turn out to be past memories? What happens when Lily realizes her potions professor used to be her friend in another life? Will she choose to become his friend again? Or will she break his heart like she did long ago?